Spectrum of the Kleinmann-Low nebula from 29 to 125 micrometers
The infrared spectrum of the Kleinmann-Low nebula in M42 has been measured from 80 to 350 cm/sup -1/ (approx.29--125 ..mu..m) with a Michelson interferometer aboard the NASA G. P. Kuiper Airborne Observatory. The frequency spectrum peaks at approx.185 cm/sup -1/. A simple model of the emission impli...
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| Veröffentlicht in: | Astrophys. J.; (United States) 1977-03, Vol.212, p.696 |
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| container_start_page | 696 |
| container_title | Astrophys. J.; (United States) |
| container_volume | 212 |
| creator | Erickson, E. F. Strecker, D. W. Simpson, J. P. Goorvitch, D. Augason, G. C. Scargle, J. D. Caroff, L. J. Witteborn, F. C. |
| description | The infrared spectrum of the Kleinmann-Low nebula in M42 has been measured from 80 to 350 cm/sup -1/ (approx.29--125 ..mu..m) with a Michelson interferometer aboard the NASA G. P. Kuiper Airborne Observatory. The frequency spectrum peaks at approx.185 cm/sup -1/. A simple model of the emission implies that the temperature is in the range 70--95 K, and that the optical depth is > or =0.2 at the peak frequency. A possible absorption is seen at approx.176 cm/sup -1/. Thermal emission by dust at a temperature of 71 K, with the absorption cross section proportional to frequency, provides a good fit to the data. Other thermal emission models can also fit the spectrum. The data are compared with previous broad-band measurements. Upper limits are placed on expected line emission from the surrounding H II region at the position of the nebula. |
| doi_str_mv | 10.1086/155093 |
| format | Article |
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Upper limits are placed on expected line emission from the surrounding H II region at the position of the nebula.</description><subject>640105 - Astrophysics & Cosmology- Galaxies</subject><subject>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</subject><subject>COSMIC DUST</subject><subject>DUSTS</subject><subject>ELECTROMAGNETIC RADIATION</subject><subject>ENERGY-LEVEL TRANSITIONS</subject><subject>FORBIDDEN TRANSITIONS</subject><subject>INFRARED RADIATION</subject><subject>INFRARED SPECTRA</subject><subject>INTERFEROMETERS</subject><subject>INTERSTELLAR GRAINS</subject><subject>MEASURING INSTRUMENTS</subject><subject>NEBULAE</subject><subject>PARTICLES</subject><subject>RADIATIONS</subject><subject>SPECTRA</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1977</creationdate><recordtype>article</recordtype><recordid>eNotkE1LxDAYhIMoWFf9DcGDt2revM3XSWTxCwseVPAW2jRhK_1YmizivzfLehpmeBiGIeQS2A0wLW9BCGbwiBQgUJcVCnVMCsZYVUpUX6fkLMbvveXGFOTufetdWnYjnQNNG09fB99PYzNNZT3_0Mm3u6GhYZlHyg1NMwUu6Ni7HPjkl3hOTkIzRH_xryvy-fjwsX4u67enl_V9XTrQLJVdEG0FlfAiKKnQSN4ZqBRqiR1UgTujZBAue4lctR418sY55KLpdG7AFbk69M4x9Ta6Pnm3cfM05fVWAWgOOkPXByjPi3HxwW6XfmyWXwvM7r-xh2_wD0j4UpI</recordid><startdate>19770315</startdate><enddate>19770315</enddate><creator>Erickson, E. 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W.</creatorcontrib><creatorcontrib>Simpson, J. P.</creatorcontrib><creatorcontrib>Goorvitch, D.</creatorcontrib><creatorcontrib>Augason, G. C.</creatorcontrib><creatorcontrib>Scargle, J. D.</creatorcontrib><creatorcontrib>Caroff, L. J.</creatorcontrib><creatorcontrib>Witteborn, F. C.</creatorcontrib><creatorcontrib>Ames Research Center, NASA Moffett Field, California</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Astrophys. J.; (United States)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Erickson, E. F.</au><au>Strecker, D. W.</au><au>Simpson, J. P.</au><au>Goorvitch, D.</au><au>Augason, G. C.</au><au>Scargle, J. D.</au><au>Caroff, L. J.</au><au>Witteborn, F. C.</au><aucorp>Ames Research Center, NASA Moffett Field, California</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Spectrum of the Kleinmann-Low nebula from 29 to 125 micrometers</atitle><jtitle>Astrophys. J.; (United States)</jtitle><date>1977-03-15</date><risdate>1977</risdate><volume>212</volume><spage>696</spage><pages>696-</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><abstract>The infrared spectrum of the Kleinmann-Low nebula in M42 has been measured from 80 to 350 cm/sup -1/ (approx.29--125 ..mu..m) with a Michelson interferometer aboard the NASA G. P. Kuiper Airborne Observatory. The frequency spectrum peaks at approx.185 cm/sup -1/. A simple model of the emission implies that the temperature is in the range 70--95 K, and that the optical depth is > or =0.2 at the peak frequency. A possible absorption is seen at approx.176 cm/sup -1/. Thermal emission by dust at a temperature of 71 K, with the absorption cross section proportional to frequency, provides a good fit to the data. Other thermal emission models can also fit the spectrum. The data are compared with previous broad-band measurements. Upper limits are placed on expected line emission from the surrounding H II region at the position of the nebula.</abstract><cop>United States</cop><doi>10.1086/155093</doi></addata></record> |
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| ispartof | Astrophys. J.; (United States), 1977-03, Vol.212, p.696 |
| issn | 0004-637X 1538-4357 |
| language | eng |
| recordid | cdi_crossref_primary_10_1086_155093 |
| source | Alma/SFX Local Collection |
| subjects | 640105 - Astrophysics & Cosmology- Galaxies CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COSMIC DUST DUSTS ELECTROMAGNETIC RADIATION ENERGY-LEVEL TRANSITIONS FORBIDDEN TRANSITIONS INFRARED RADIATION INFRARED SPECTRA INTERFEROMETERS INTERSTELLAR GRAINS MEASURING INSTRUMENTS NEBULAE PARTICLES RADIATIONS SPECTRA |
| title | Spectrum of the Kleinmann-Low nebula from 29 to 125 micrometers |
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